Very hard dried tofu is usually softened by soaking it in warm water overnight.

Dried tofu, one of the traditional soy products of the Han nationality, is a reprocessed product of tofu. It is salty and refreshing, hard yet tough, and will last for a long time. It is a delicacy found in all major Chinese cuisines. Dried tofu is rich in nutrients, containing a large amount of protein, fat, carbohydrates, as well as calcium, phosphorus, iron and other minerals needed by the human body. Salt, fennel, pepper, aniseed, dried ginger and other seasonings are added to dried tofu during the production process. It is fragrant and fresh, and you will never get tired of eating it for a long time. It is known as "vegetarian ham".